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Evaluation Board User Guide
UG-077
One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
AD9522-x Evaluation Board
Please see the last page for an important warning and disclaimers. Rev. 0 | Page 1 of 16
FEATURES
Simple power connection using 6 V wall adapter and
on-board LDO voltage regulators
LDOs are easily bypassed for power measurements
5 ac-coupled differential LVDS SMA connectors
7 LVDS differential headers for additional outputs
SMA connectors for
2 reference inputs
Charge pump output
Clock distribution input
USB connection to PC
Microsoft Windows-based evaluation software
with simple graphical user interface
On-board PLL loop filter
Easy access to digital I/O and diagnostic signals via I/O
header
Status LEDs for diagnostic signals
APPLICATIONS
Clocking of analog-to-digital and digital-to-analog
converters up to 2.9 GHz
Networking and communications line cards
Test and measurement equipment
Wireless base stations, controllers
Clock cleanup/jitter attenuation
Clock distribution
GENERAL DESCRIPTION
The AD9522-x (hereafter referred to as AD9522) is a very low
noise PLL clock synthesizer featuring an integrated VCO, clock
dividers, and up to 24 outputs. The AD9522 features automatic
holdover and a flexible reference input circuit allowing for very
smooth reference clock switching. The AD9522 family also
features the necessary provisions for an external VCXO.
The AD9522 evaluation board is a compact, easy to use plat-
form for evaluating all features of the AD9522. This user guide
covers all six versions of the AD9522 family.
Although the Quick Start Guide to the AD9522 PLL section
applies specifically to the AD9522-4, increasing the N (feedback)
divider and channel divider increases the VCO frequency to the
allowable frequency range of other AD9522 versions.
For the AD9522-5, which lacks the internal VCO, certain portions
of this user guide that apply to the internal VCO (such as VCO
calibration) can be ignored.
For convenience, detailed information from the AD9522 data sheet
has been included here. Use this user guide in conjunction with
the AD9520 and AD9522 data sheets and software documenta-
tion available at www.analog.com.
AD9522 EVALUATION BOARD
08747-001
Figure 1.
